102 GOLD AND TIN DEPOSITS OF SOUTHERN APPALACHIANS. 
The country rock for miles around, so far as known, is amphibolite, of varying degree of 
foliation but all sufficiently squeezed to be classed as schist. Several quartz veins occur in 
the amphibolite parallel to its foliation, which here strikes about N. 35° E. and dips about 
65° SE. Although some work was formerly done on at least three of these veins, only the 
southeastern one is now being worked. On and near the surface the vein is fairly regular, 
averaging about 2 feet wide. At about 70 feet the vein pinches and soon splits up as 
represented in fig. 14, which is a sketch of the cross section of the vein as shown at the 
northeast end of the shaft at the 85-foot level. These lenses have been somewhat modified 
in form and outline by subsequent crushing, so that the exposure at the side of the shaft 
suggests magnified augen gneiss. 
Amphibolite Quartz 
Fig. 14. — Sketch of vein, vertical section, Schlegelmilch mine, near bottom of shaft, looking northeast. 
The vein stuff is quartz carrying a variable proportion of auriferous pyrite, which, in 
some cases at least, is slightly cupriferous. So far as known native gold does not occur in 
the unoxidizcd portions of the vein. Pyrite, sericite, calcite, biotite, chlorite, and perhaps 
serpentine are developed in the near-by amphibolite by the metasomatic action of the vein 
solutions. Pyrite is not abundant in the wall rock and occurs usually as small cubes. The 
calcite, because of its easy solubility, is frequently found in crevices in the quartz vein, 
having probably been carried in from the walls. Much of it is slightly greenish, perhaps 
because of a slight intermixture of chlorite. A narrow veinlet of fluorite cutting the quartz 
is obviously of later formation, but is doubtless referable to the same source as the siliceous 
solutions. Assays of specimens from neighboring portions of the vein show decided fluctua- 
tions from almost nothing to $50 or over per ton. The average value was not learned 
